NAVFAC SNOOPY 



NAVFAC SNOOPY is a small, remotely-controlled vehicle system that was designed 

 and built for the Naval Facilities Engineering Command to support ocean construction 

 work. Its primary uses are optical surveys of proposed undersea construction or implant- 

 ment sites, surveillance and documentation of diver operations, and general undersea 

 inspection and documentation. The 2- by 2-by 4- foot-long (0.6 by 0.6 by 1.2 meters) 

 vehicle (figure 7) weighs 300 pounds (136 kilograms) in air and operates to 1500 feet 

 (460 meters). It utilizes four hydraulically-powered thrusters for horizontal and vertical 

 excursions. The three horizontal thrusters are controlled by a three-axis, proportional 

 joystick for integrated forward, reverse, turning, and lateral vehicle motions. The vertical 

 thruster's control uses automatic depth- and altitude-holding circuitry with manual over- 

 ride. A low-light-level television camera with a 250-watt, quartz iodized light is used for 

 viewing, and a super-8 movie camera provides color documentation. Other sensors include 

 a compass, altimeter, depthometer, and Straza 250 passive-active CTFM sonar. The 

 vehicle's power, control signals, video signal, and instrument data are multiplexed onto a 

 single coaxial tether. 







Figure 7. NAVFAC SNOOPY. 



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